Tokay Gecko Information... The tokay gecko is the 2nd largest gecko in the world growing up to 51 cm long (20 inches). Though human development is reducing it's range, this lizard is adapting well to living in man-made structures and it's common to see them sticking to the walls and ceilings ridding the place of big bugs and small rodents. Tokay Gecko Mating Call... Tokay is an onomatopoeia for it's two syllable mating call "tow - kay." American soldiers in Vietnam heard something different and called it the F-you lizard. Luckily that name didn't stick. Tokay Gecko Bite... Tokay geckos are quick to bite when handled and sometimes clamp on tight refusing to let go. Large specimens will draw blood however the pain is surprisingly not that bad. I've been bitten hundreds of times by tokay geckos with no serious issues... Just A little broken skin and the creeps. Rinse the wound off with soap and water and you should be fine. Despite their eagerness to clamp down on the person that clamps down on them, tokay geckos can be taught to tame down after regular handling and work. Thailand superstitions tells that if the Tokay geckos call 7 times, it's bad luck. Luckily this one called 8.